Ventilator



May 18, 1937.

T. A. HEPPENSTALL VENTILATOR Patented May 18, 1937 Wm sm'rs rg'r trier.

signor to H. H. Robertson Company,

Pittsburgh,

Pa., a corporation of Pennsylvania Application October 19, 1934, SerialNo. 749,087 In Great Britain November 7, 1933 3 Claims.

This invention relates to ventilators for use on buildings, ships, andother structures and has for its object to provide a ventilator capableof functioning efficiently with the wind blowing 5 from all directions.

According tothis invention a ventilator comprising a cap membersupported above and in line with an eduction pipe and cooperating with astorm band to form a gas outlet, is provided with a rain bafllelocatedwithin the storm band, below the upper edge of the said stormband, and extending above the lower edge of the cap member to form withthe cap member within the storm band a continuation of the gas outletbetween it and the cap member and to prevent rain entering the stormband at its top from passing into the eduction pipe, and to form agutter within the storm band below the upper edge thereof.

In the accompanying drawing,

Fig. 1 is an elevation of a ventilator embodying the invention;

Fig. 2, a vertical section of the same;

Fig. 3, a section on the line 3-3, Fig. '2, looking down, and

Figs. 4 and 5, details of supporting plates or vanes to be referred to.

The ventilator herein shown comprises an eduction pipe I0, whichcommunicates with the interior of the building or other structure andhas its upper end extended up into the lower end of a materially largerstorm or suction band l2 having within it a cap member l3 located abovethe eduction pipe I0 in line therewith to prevent rain fallingvertically downward from passing through the eduction pipe into thebuilding.

The cap member l3 forms with the storm band l2 an outlet passage [4 forthe gases sucked out of the ventilator by air currents outside of theventilator and flowing against the same hori- 40 zontally or in aninclined direction either upwardly or downward.

The eduction pipe I!) is provided at its upper end with an outwardlyextended lip 48, preferably inclined downward and acting to trap airwhich may strike the eduction pipe below the storm band and passupwardly along the eduction pipe.

Horizontally and upwardly inclined air curents which strike the outsideof the storm band 50 or suction pipe pass upwardly over the upper edgeof the storm band and create within the entilator a suction which drawsthe gases from the eduction pipe and out of the ventilator through thegas outlet passage [4. It is highly desirable to have the gases suckedout of the eduction pipe flow freely out of the ventilator with theleast obstruction, and yet prevent the rain and air flowing in adownward inclined direction from entering the eduction pipe. This isaccomplished by locating within the storm band above the gas outletpassage l4 a baffle I5 which is inclined upwardlyand inwardly from thestorm band l2 (see Fig. 2), and for the best results is made of suchwidth as to have its upper edge project over the lower portion of thecap member and thereby prevent vertically descending rain or aircurrents from passing into the ventilator through the outlet passage Min a straight vertical path and thereby prevent the liability of rain orair currents, which may enter the ventilator at its top from reducingthe suction of the gases out of the eduction pipe to such extent as tocause back draughts in the eduction pipe and in the building or otherstructure on which the ventilator is mounted.

The baffle I5 in the present instance is shown as a frustum of a coneand is preferably of a clifierent inclination than the cap member, so asto form with the latter a passage 2!] which forms an inclinedcontinuation of the gas outlet l4 and increases in width toward itsoutlet end.

The inclined bafiie l5 forms with the storm band l2 a gutter 2| in whichrain water may accumulate and fiow to the outside of the ventilatorthrough weep holes 22 in the storm band. The baffie I5 has its lower endlocated below the top of the storm band so as to utilize the portion ofthe storm band which extends above the lower edge of the baffle, toobtain maximum suction by wind currents flowing upwardly on the outsideof the storm band.

The baffle l5 forms an effective barrier to rain passing downward at anangle over the top edge of the storm band, and prevents such rain frompassing through the gas outlet directly into the eduction pipe.

The baffle l5 and cap member 63 may be supported by a plurality ofvertically arranged plates or vanes 25, which may be suitably secured tothe storm band and are shown in elevation and plan in Figs. 4 and 5.Alternately, in place of the p ates or vanes 25, any convenientarrangement of straps, bars, angle irons, or the like may be provided tosupport the storm band, baflie and member in the required relativepositions.

Wind and rain which may enter the top of the ventilator over the upperedge of the bailie l5 strikes the conical cap member and is caused toflow downward and outwardly toward the storm band through the gas outletl4 and pass in a substantially vertical path through the storm band andout through the bottom thereof, while currents of air flowing down theoutside of the storm band I2 create a suction in the space between thebottom, of the storm band and the deflecting member 26 whereby air andgases would be drawn from the eduction pipe and drawn through thisspace.

,The downward inclined deflecting ring 26 may be secured by vanes orplates 21 to the eduction pipe, and said vanes have secured to theirunderside an upwardly inclined deflecting ring or member 29, whichserves to deflect to the outside of the storm band upwardly inclined aircurrents.

The deflecting members 26, 29 form a double cone, which is located belowthe storm band and may be supported on the eduction pipe ID by straps,bars, angle irons, or the like, and said double cone is separated fromthe eduction pipe I 0 by an air space 30 of a width substantially equalto the width on a horizontal plane of the lip 40 on the upper end of theeduction pipe, so that any air which may pass through said space alongthe eduction pipe will be trapped by the lip 40.

Having thus described the invention, what is claimed is:

1. In a ventilator of the character described, in combination, aneduction pipe, a cap member above and in line" with said eduction pipe,a storm'band co-operating with said cap member to form a gas outlet, arain bafile located within the storm band below the upper edge of thestorm band to form with the cap member within the storm band acontinuation of the gas outlet between it and the cap member and toprevent rain entering thestorm band at its top from passing into theeduction pipe, and to form a gutter within the storm band below theupper edge thereof, and a double cone surrounding the eduction pipebelow the storm band.

2. In a ventilator of the character described, in combination, aneduction pipe, a cap member above and in line with said eduction pipe, astorm band co-operating with said cap member to form a gas outlet, arain baflle located within the storm band below the upper edge of thestorm band to form with the cap member within the storm band acontinuation of the gas outlet between it and the cap member and toprevent rain entering the storm band at its top from passing into theeduction pipe, and to form a gutter within the storm band below theupper edge thereof, a double cone surrounding the eduction pipe belowsaid storm band and separated from the latter, and a lip on the eductionpipe above said double cone to trap air passing upwardly lengthwise ofthe eduction pipe through the space between the eduction pipe and saiddouble cone. 7

3. In a ventilator of the character described, in combination, aneduction pipe, a cap member above and in line with said eduction pipe, astorm band cooperating with said cap member to form a gas outlet, a rainbaflie located within the storm band below the upper edge of the stormband to form with the cap member within the storm band a continuation ofthe gas outlet between it and the cap member and to prevent rainentering the storm band at its top from passing into the eduction pipe,and to form agutter within the storm band below the upper edge thereof,

a conical air deflector surrounding the eduction pipe below said stormband and separated from the latter, and a lip on the eduction pipe abovesaid double cone to trap air passing upwardly lengthwise of the eductionpipe through the space between the eduction pipe and said double cone.

THOMAS A. HEPPENSTALL.

